HEB1B045B - 45Amp Circuit Breaker

HEB1B045B - 45Amp Circuit Breaker

Keeping your existing electrical system operating safely often comes down to using the right replacement breaker. The Siemens HEB1B045B is a 45 Amp, 1-pole molded case circuit breaker made for compatible HEB (EG) frame panelboards. It uses a thermal-magnetic trip mechanism to help protect your circuits from overloads and short circuits, making it a dependable choice for routine maintenance, repairs, and replacement projects. Factory-installed load-side lugs (TA1EG10) accept 8 AWG through 1/0 AWG copper or aluminum conductors, helping simplify installation in compatible systems. Like other Siemens molded case breakers, the HEB1B045B is built to last and is intended for long-term service in existing electrical distribution equipment.

Key Features and Benefits

• Siemens HEB (EG) frame molded case circuit breaker
• 45 Amp current rating
• Single-pole design
• Thermal-magnetic trip protection
• Rated for 277 VAC systems
• Factory-installed load-side lugs (TA1EG10)
• Accepts 8 AWG to 1/0 AWG copper or aluminum wire
• Designed as a form, fit, and functional replacement for compatible Siemens HEB frame panelboards

Technical Specifications

• Manufacturer: Siemens
  
• Catalog Number: HEB1B045B
  
• Product Type: Molded Case Circuit Breaker
  
• Frame: HEB (EG Frame)
  
• Amperage: 45 Amps
  
• Poles: 1
  
• Voltage Rating: 277 VAC
  
• Trip Type: Thermal-Magnetic
  
• Interrupting Rating: 65kAIC @ 277 VAC; 25kAIC @ 347 VAC
  
• Terminal Type: Load-side lugs (TA1EG10)
  
• Wire Size: 8 AWG to 1/0 AWG Copper/Aluminum
  
• Dimensions: 1" W × 5.5" H × 3" D
  
• Weight: 1.257 lb
  
• Country of Origin: Dominican Republic
  

Material Compliance and Certifications

• UL Listed
• Accepts copper and aluminum conductors
• ECCN: EAR99
• Commodity Code: 8536200040
• WEEE Category: 5
• Not classified as dangerous goods
  

Where It Works Best

The Siemens HEB1B045B is used in compatible HEB (EG) frame low-voltage panelboards found in commercial buildings, industrial facilities, schools, healthcare campuses, and similar electrical distribution systems.